Did Dave forget that Orks get +1 initiative from furious charge when assaulting? I didn't go and count all the dice he rolled when countering, but it looked like he was going in order of SM 4, Ork 3, Power Klaw 1, Power Fist 1. If that is how he did it, then he should have done SM and Orks at same time, and the Klaw before the Fist.

Lovely game and video, though you mess up the rules for the assault phase. First you make ALL assault moves..that means all your units who assault. AFTER that, all defenders react with 6" moves. Finally, you resolve one assault at a time.

Yeah just checked page 33 of the 40k rulebook.
1. Pick a unit.
2. Declare which enemy unit it is going to assault.
3. Move the assaulting unit.
4. Pick another unit and repeat above steps until all assaulting units have moved.

Marines are I4, Orks are I2, Nobs are I3.... Furious Charge adds one Initiative to units that charge on the turn they charge. This doesn't count for stuff with a Power Fist/Klaw which always strikes at I1....

Any ork units with the Waaagh special rule gain fleet for the duration of their turn on a turn in which Dave makes that weird noise... A roll of a 1 for the run move in that turn causes a wound on the unit as the orks get a bit too excited and start fighting before they get to the enemy!!!